docs: def process_all_common_disease_files(self, limit=None):
          """
          Loop through all of the files that we previously fetched from git,
          creating the disease-phenotype association.
          :param limit:
          :return:
  
          """
          LOG.info("Iterating over all common disease files")
          common_file_count = 0
          total_processed = ""  # stopgap gill we fix common-disease files
          unpadded_doids = ""   # stopgap gill we fix common-disease files
          for ingest in self.files:
              if ingest[:5] == 'common':
                  common_file_count += 1
                  raw = self.files[ingest]['file']
                  total_processed += self.process_common_disease_file(
                      raw, unpadded_doids, limit)
              if not self.test_mode and limit is not None and total_processed > limit:
                  break
          LOG.info("Finished iterating over all common disease files.")
          return